Just received my TF-100 kit yesterday & the CYA test is giving me trouble. I have tried three different times & the closest reading for the R-7065 sample was 40ppm. When I tested my own water, the dot was visible until about 25ppm. I reviewed recent pool store results & they say my CYA is @ 50!?
I think I may have some algae growing on the wall in the shallow end (although my water remains clear thus far) There is a patch of dark brown/green dots no bigger than a pencil points. They feel slightly slimy at first but do not brush off or scratch off with finger nail!
I am not sure where to begin.??( Especially since I can not figure out how to get an accurate CYA test. )
Here are the rest of my results:
About three weeks ago we did an ascorbic acid treatment to remove metal stains. I added Polyquat 60 while the FC was at zero. We were able to lift all the stains but I think the chlorine was too low for too long? Thank you for any guidance you can give me.